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0 votes
1 answer
486 views

Removing Expiring SSL (TLS) cert caused inability to receive mail in Thunderbird Mail

I recently switched my SSL (TLS) certificate from a regular one to Let's Encrypt. I decided to get rid of my old expiring cert files, but I physically removed them, I've started to have strange issues ...
papakota's user avatar
1 vote
1 answer
2k views

Digitally sign Gmail emails with S/MIME

When some of my contacts send mails, I see "signed by gmail" in the headers. In my mail client (Mail.app) I can see that it is a Verisign certificate. Is there a way to get a certificate from Google (...
Clément's user avatar
  • 121
3 votes
3 answers
15k views

Security Warning: The Server you are connected to is using a security certificate that cannot be verified. The Target principal name is incorrect

I'm trying to get my mails using Outlook 2007 and POP3 using SSL but I get this security warning every time I try to receive mails: The Server you are connected to is using a security certificate ...
mani_007's user avatar
  • 135